I ordered a copy of my credit report and found a debt on it that I do not believe that I owe. I sent a letter to this collection ageny requesting to validate this debt. I just got a response stating that the do not have to validate since the law provides that unless you demand validation of the debt within 30 days of the receipt of their first letter to you they are entilted to assume that the debt is valid. I have never received any letter from this agency. What can I do?